BULL. GEOL. SOC. AM. 









VOL. 18, 1906, PL. 16 



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Figure 1. — Eastern Margin of Atrevida Glacier 



It is destroying alder thicket, .Tune 29, 1006. In 1905 this was a moderately sloping 



moraine-covered ice slope 



Figure 2.— 

 See Russell 



-Broken Margin op Atrevida Glacier, June 29, 1906, where glacial Stream 



issues 



s photograph (Nat. Geog. Mag., volume 3, 1891, plate 10). This stream emerged 

 from a large ice cave in August, 1905 



ADVANCING EASTERN MARGIN OF ATREVIDA GLACIER, 1906 



